List of Bonanza episodes - WikipediaBonanza was an American western television series developed and produced by David Dortort and broadcast in the United States for 14 seasons on the NBC network The entire run of the series' 431 hour-long episodes was produced in color The premiere was on September 12, 1959, and the final episode broadcast on January 16, 1973 In its initial season, Bonanza aired on Saturday evenings and